reads a term from a stream.

read (-Term)
read (+Stream, -Term)

read/1 reads from the current inputstream a single term(Term).
read/2 reads from the given stream(Stream) a single term(Term).
If the end of the stream is reached, Term will be unified with the atom end_of_file.

Arguments

Stream                 text input stream
Term                   term

Examples

?- open('test.data', write, Stream),
   print(Stream, [hello(world), '.']),
   close(Stream).

?- open('test.data', read, Stream),
   read(Stream, Term1),
   read(Stream, Term2).

Term1  = hello(world)
Term2  = end_of_file

Standard

These predicates are part of the ISO-Prolog Standard.

See also